@article{siddiqi_1980, 
  title={Generalized absolute continuity of a function of Wiener's class}, 
  volume={22}, 
  DOI={10.1017/s0004972700006559}, 
  number={02}, 
  publisher={Cambridge University Press (CUP)}, 
  author={Siddiqi}, 
  year={1980}
  }